The construction industry has evolved greatly over the last decade with an increased emphasis on energy-efficiency, eco-friendliness, and the rehabilitation of older structures.  Every year material manufacturers, such as James Hardie, introduce newly developed products that can be more durable, more energy efficient, cheaper to produce, or just plain better than older materials.  Many contractors, though, become complacent with the older materials because the contractor is familiar with the older product and is too uneducated to use the newer product.  These contractors can also be unwilling to learn new installation techniques appropriate for these new materials.